Collecting means for gold-dredges.



T. J. BARBOUIL GOLLEGTINGMEANS FOR GOLD DRBDGES. APPLIOATIONTILED13110.21, 1 905.

qPatented Oct. 12, 1909.

3 SHEETS-SHEET 1.

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X25-ww T. J'. BARBOUR; GOLLEC'TLINGl MEANS. POR yGOLD DRBDGBS.`APPLICATION FILED DEQl 2 1, 1905.

936,754; Patented oct.'12,19o9.

Y Y 3 SHEETS-SHEET 2.

ANDREW. u GRAHAM co., Pmmuncumpnma. wmucfou, n. c,

T. J. BARBOUR. GOLLEGTING MEANS FORGOLD DREDGES.

' APILIOATIN FILED DEO. 21, 1905.

3 SHEETS-SHEET 3,

THOMAS ir. BARBOUR, or SAN FRANCISCO, CALIFORNIA.

COLLECTING MEANS FOR GOLD-DREDGES.

Specification of Letters Patent.

kPatentet'l; Oct. 12, 1909.

Application filed December 21, 1905. Serial No. 292,745.

To all'fwhom it may concern: l A

Be it known that., I, THOMAS J. BARBOUR,

a citizen of the United States, residing in` increase the area of thecollecting surfacev over which the material is forced to travel, therebypermitting the handling of a greater quantity of material within a giventime,

and the recovery of a greater percentage of the fine precious metalscontained'withn the material carried over the surface of the collectingmeans. l

To comprehend the invention, reference should be had to the accompanyingdrawings, wherein Figure l is a plan view of the collecting means, withthe rotary separator in proper position relative to the side sluice-wayfor receiving the material discharged from the said rotary separatoronto the distributing plate or table arranged below the rotaryseparator. Fig. 2 is a side view in elevation of the parts disclosed byFig. 1 of the drawings. Fig. 3 is an end view in elevation viewed fromthe discharge end of the collecting tables.

The numeral 1 designates any suitable form of a separator, although inthe present case the same indicates a rotary separator or grizzly, whichis mounted at an inclination. Where a rotary separator or grizzly isused, the same is cylindrical in form in cross section. Any suitablemeans, not shown, may be employed for imparting rotation to theseparator or grizzly, the dredged material to be treated or worked beingdelivered onto a chute 2, which leads the material into the upper end ofthe inclined separator or grizzly l. This separator or grizzly isarranged a slight distance above a longitudinally disposed distributingplate 3, which receives the material discharged through the openings ofthe separator or grizzly. The said distributing plate or plates issupported at an inclination corresponding to that of the separator orgrizzly, the receiving surface of the distributing plate or plates beinginclined laterally, so as to equally distribute the material-deliveredthereon to the side sluice boxes 4 5, the collecting surface of eachsluice box being preferably covered with riiiied plates or bars, notshown. These sluiceboxes are run at a downward inclination toward thelaterally disposed distributing launders. Due to the inclination of theside sluice-boxes, together with the force of the water flowing throughthe boxes, the material delivered from the distributing plate or plates3, is carried the entire length of the said boxes, and dischargedtherefrom into the return sluice-way or box 6, which box is arranged atan opposite inclination to that of the downwardly inclined sluice-boxesl--5. This sluice-box 6 communicates at its lower forward end with thesecond or lower return sluice-way or box 7, which said sluiceway or boxis arranged at an opposite inclination to that of the sluice-way or box6. Like sluice-ways or boxes 4 5, the surface of each sluice-way or box6 7 is preferably covered with riiiled plates or bars for catching asmuch of the valuable metals contained within flowing material aspossible, while traveling through the longitudinally disposedsluice-ways or boxes Ll, 5, 6 and 7. The oppositely inclined returnsluice-ways 6 7 materially prolong the travel of the flowing material,and thus considerably increase the area of the collecting surface forthe precious metal.

The lower return sluice-way or box 7 discharges into the laterallydisposed inclined launders 8 9, which launders deliver the material ontothe longitudinally disposed inclined collecting tables l2. Such of thevaluable metals not caught in the system of sluice-ways or boxes will berecovered on the table 12, as the material is forced to travel over thesaid series of downwardly inclined collecting tables. To provide againstthe escape of the finer particles of precious metals by being carriedover the discharge or tail end of the tables, and to give a rifedsurface thereto, the face of each table is preferably provided with acovering 13 of riftled or fibrous material, such as cocoa-matting, overwhich is placed a layer 14 of expanded metal, which is held down in anysuitable manner. In the present case, the separator or grizzly l isinclosed between the longitudinal side walls 15, access being had to thesluice-way 4 5, by means of the hinged doors 16-16, which doors arethrown upward for the purpose of making a clean up of said sluice-ways.

Having thus described the invention, what is claimed as new and desiredto be protected by Letters Patent isl. The combination with a downwardlyinclined separator grizzly, of a downwardly inclined distributer platepositioned beneath M the grizzly and extending parallel therewith, thereceiving surface of said plate being inclined downwardly from thecentral portion to the edges thereof, a longitudinally disposeddownwardly inclined sluiceway arranged at each side of the distributingplate to receive the material flowing from the surface thereof,oppositely inclined return sluiceways arranged to successively receivethe material flowing from the sluiceways positioned at the sides of thedistributing plate, all of said sluiceways extending in the samedirection as the grizzly and being positioned therebeneath, side wallshousing all of said sluiceways and constituting a hopper partiallyinclosing the grizzly, a

series of collecting tables, and a Vseries of runways'ext'ending fromthe discharge end of the lowermost sluiceway to said tables.

2. The combination with a downwardly inclined rotary grizzly, of adownwardly inclined distributer plate positioned beneath the grizzly andextending in the same direction, a longitudinally disposed downwardlyinclined sluiceway arranged at each Side of the distributer plate toreceive the L material flowing from the surface thereof, oppositelyinclined return sluiceways arranged to successively receive the materialflowing from the sluiceways positioned at the sides of the distributerplate, all of said sluiceways extending in the same direction as thegrizzly and being positioned directly therebeneath, side walls housingall of said sluiceways and constituting a hopper partially inclosing thegrizzly, doors in said side walls affording access to the sluiceways andcollecting tables comnnmicating with the discharge end of the lowermostsluiceway.

In testimony whereof I have hereunto aflixed my signature in thepresence of witnesses.

THOMAS J. BARBOUR.

Titnesses AUGUSTUS TAYLOR, GEORGE H. EVANS.

